2221663429 has 2 divisors, whose sum is σ = 2221663430. Its totient is φ = 2221663428.

The previous prime is 2221663427. The next prime is 2221663447. The reversal of 2221663429 is 9243661222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288666404 + 932997025 = 35898^2 + 30545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221663429 - 2¹ = 2221663427 is a prime.

Together with 2221663427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221663421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110831714 + 1110831715.

It is an arithmetic number, because the mean of its divisors is an integer number (1110831715).

Almost surely, 2^2221663429 is an apocalyptic number.

It is an amenable number.

2221663429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221663429 is an equidigital number, since it uses as much as digits as its factorization.

2221663429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 2221663429 is about 47134.5248093157. The cubic root of 2221663429 is about 1304.8464911450.

The spelling of 2221663429 in words is "two billion, two hundred twenty-one million, six hundred sixty-three thousand, four hundred twenty-nine".